Find the value of the left side of the schrödinger equation when aψ1+bψ2 is substituted for ψ. to make input easier, use u for u(x) and use the abbreviations −ℏ22md2ψ1dx2=ϕ1 and −ℏ22md2ψ2dx2=ϕ2. express your answer in terms of ψ1, ψ2, ϕ1, ϕ2, a, b, and u.

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

Asurvey of 45 teens found that they spent an average of 25.6 hours per week in front of a screen (television, computer, tablet, phone, based on the survey’s sample mean, which value could be the population mean? 2.3 hours 27.4 hours 75.3 hours 41.5 hours

Aubrey read 29 books and eli read 52 books what number is equal to the number of books aubrey read?